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Finding the Fourth Proportional to 545,345.10, 752,708.76 and 315,865.38

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Solution

The fourth proportional to 545,345.10, 752,708.76 and 315,865.38 is: 435,970.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,345.10 : 752,708.76 = 315,865.38 : x
  2. Step 2: Convert to fraction form
    545,345.10/752,708.76 = 315,865.38/x
  3. Step 3: Cross multiply
    545,345.10x = 752,708.76 × 315,865.38
  4. Step 4: Simplify right side
    545,345.10x = 237,754,638,506.73
  5. Step 5: Solve for x
    x = 237,754,638,506.73/545,345.10
  6. Step 6: Final answer
    x = 435,970.98

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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.