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Finding the Fourth Proportional to 630,612.90, 870,265.02 and 358,720.20

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Solution

The fourth proportional to 630,612.90, 870,265.02 and 358,720.20 is: 495,044.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,612.90 : 870,265.02 = 358,720.20 : x
  2. Step 2: Convert to fraction form
    630,612.90/870,265.02 = 358,720.20/x
  3. Step 3: Cross multiply
    630,612.90x = 870,265.02 × 358,720.20
  4. Step 4: Simplify right side
    630,612.90x = 312,181,642,027.40
  5. Step 5: Solve for x
    x = 312,181,642,027.40/630,612.90
  6. Step 6: Final answer
    x = 495,044.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.