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Finding the Fourth Proportional to 487,820, 735,386.54 and 455,306.96

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Solution

The fourth proportional to 487,820, 735,386.54 and 455,306.96 is: 686,373.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,820 : 735,386.54 = 455,306.96 : x
  2. Step 2: Convert to fraction form
    487,820/735,386.54 = 455,306.96/x
  3. Step 3: Cross multiply
    487,820x = 735,386.54 × 455,306.96
  4. Step 4: Simplify right side
    487,820x = 334,826,609,952.32
  5. Step 5: Solve for x
    x = 334,826,609,952.32/487,820
  6. Step 6: Final answer
    x = 686,373.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.