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Finding the Fourth Proportional to 645,214.88, 890,345.88 and 358,717.52

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Solution

The fourth proportional to 645,214.88, 890,345.88 and 358,717.52 is: 495,002.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,214.88 : 890,345.88 = 358,717.52 : x
  2. Step 2: Convert to fraction form
    645,214.88/890,345.88 = 358,717.52/x
  3. Step 3: Cross multiply
    645,214.88x = 890,345.88 × 358,717.52
  4. Step 4: Simplify right side
    645,214.88x = 319,382,666,015.82
  5. Step 5: Solve for x
    x = 319,382,666,015.82/645,214.88
  6. Step 6: Final answer
    x = 495,002.02

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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.