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Finding the Fourth Proportional to 430,603.32, 645,970.59 and 220,170.18

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Solution

The fourth proportional to 430,603.32, 645,970.59 and 220,170.18 is: 330,288.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,603.32 : 645,970.59 = 220,170.18 : x
  2. Step 2: Convert to fraction form
    430,603.32/645,970.59 = 220,170.18/x
  3. Step 3: Cross multiply
    430,603.32x = 645,970.59 × 220,170.18
  4. Step 4: Simplify right side
    430,603.32x = 142,223,461,075.01
  5. Step 5: Solve for x
    x = 142,223,461,075.01/430,603.32
  6. Step 6: Final answer
    x = 330,288.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.