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Finding the Fourth Proportional to 630,637.38, 870,298.80 and 358,744.68

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Solution

The fourth proportional to 630,637.38, 870,298.80 and 358,744.68 is: 495,078.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,637.38 : 870,298.80 = 358,744.68 : x
  2. Step 2: Convert to fraction form
    630,637.38/870,298.80 = 358,744.68/x
  3. Step 3: Cross multiply
    630,637.38x = 870,298.80 × 358,744.68
  4. Step 4: Simplify right side
    630,637.38x = 312,215,064,510.38
  5. Step 5: Solve for x
    x = 312,215,064,510.38/630,637.38
  6. Step 6: Final answer
    x = 495,078.59

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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.