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Finding the Fourth Proportional to 420,681.40, 627,802.48 and 375,804.16

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Solution

The fourth proportional to 420,681.40, 627,802.48 and 375,804.16 is: 560,830.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,681.40 : 627,802.48 = 375,804.16 : x
  2. Step 2: Convert to fraction form
    420,681.40/627,802.48 = 375,804.16/x
  3. Step 3: Cross multiply
    420,681.40x = 627,802.48 × 375,804.16
  4. Step 4: Simplify right side
    420,681.40x = 235,930,783,642.32
  5. Step 5: Solve for x
    x = 235,930,783,642.32/420,681.40
  6. Step 6: Final answer
    x = 560,830.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.