Home / 487,747.56-672,864.30-315,721.02

Finding the Fourth Proportional to 487,747.56, 672,864.30 and 315,721.02

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Solution

The fourth proportional to 487,747.56, 672,864.30 and 315,721.02 is: 435,547.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,747.56 : 672,864.30 = 315,721.02 : x
  2. Step 2: Convert to fraction form
    487,747.56/672,864.30 = 315,721.02/x
  3. Step 3: Cross multiply
    487,747.56x = 672,864.30 × 315,721.02
  4. Step 4: Simplify right side
    487,747.56x = 212,437,403,117.59
  5. Step 5: Solve for x
    x = 212,437,403,117.59/487,747.56
  6. Step 6: Final answer
    x = 435,547.85

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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.