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Finding the Fourth Proportional to 528,521.40, 729,354 and 295,948.80

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Solution

The fourth proportional to 528,521.40, 729,354 and 295,948.80 is: 408,406.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,521.40 : 729,354 = 295,948.80 : x
  2. Step 2: Convert to fraction form
    528,521.40/729,354 = 295,948.80/x
  3. Step 3: Cross multiply
    528,521.40x = 729,354 × 295,948.80
  4. Step 4: Simplify right side
    528,521.40x = 215,851,441,075.20
  5. Step 5: Solve for x
    x = 215,851,441,075.20/528,521.40
  6. Step 6: Final answer
    x = 408,406.25

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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.