Home / 645,323.15-890,509.32-358,837.07

Finding the Fourth Proportional to 645,323.15, 890,509.32 and 358,837.07

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Solution

The fourth proportional to 645,323.15, 890,509.32 and 358,837.07 is: 495,174.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,323.15 : 890,509.32 = 358,837.07 : x
  2. Step 2: Convert to fraction form
    645,323.15/890,509.32 = 358,837.07/x
  3. Step 3: Cross multiply
    645,323.15x = 890,509.32 × 358,837.07
  4. Step 4: Simplify right side
    645,323.15x = 319,547,755,196.49
  5. Step 5: Solve for x
    x = 319,547,755,196.49/645,323.15
  6. Step 6: Final answer
    x = 495,174.79

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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.