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Finding the Fourth Proportional to 970,547,280.80, 1,455,820,921.20 and 644,029,930.40

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Solution

The fourth proportional to 970,547,280.80, 1,455,820,921.20 and 644,029,930.40 is: 966,044,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    970,547,280.80 : 1,455,820,921.20 = 644,029,930.40 : x
  2. Step 2: Convert to fraction form
    970,547,280.80/1,455,820,921.20 = 644,029,930.40/x
  3. Step 3: Cross multiply
    970,547,280.80x = 1,455,820,921.20 × 644,029,930.40
  4. Step 4: Simplify right side
    970,547,280.80x = 937,592,246,555,299,840
  5. Step 5: Solve for x
    x = 937,592,246,555,299,840/970,547,280.80
  6. Step 6: Final answer
    x = 966,044,895.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.